Final answer:
The aspects of Big Data that lead to IT security challenges are volume and variety.
Step-by-step explanation:
The correct answer is d. Volume and Variety. Big Data is characterized by its high volume, velocity, and variety of data. Volume refers to the large amounts of data generated and collected, while variety refers to the different types and formats of data. These two aspects of Big Data pose significant IT security challenges.
With the large volume of data being stored and processed, it becomes more difficult for organizations to ensure the security of all the data. The more data there is, the more opportunities there are for security breaches and unauthorized access. Additionally, the variety of data increases the complexity of securing the different types and formats of data.
For example, a company may have sensitive customer data stored in a database, but also have data from IoT devices or social media streams that need to be secured. Each type of data requires different security measures and poses unique challenges for IT security professionals.